Great. I assumed Camera Raw was imbedded in Lightroom. My mistake. Thanks again for your help. The link is very informative.
Quote "I assumed Camera Raw was imbedded in Lightroom."
Yes each version of Lightroom has the equivalent of a specific version of Adobe Camera Raw built into the application. e.g Lightroom CC 2015.8 / Lightroom 6.8 has the equivalent of Adobe Camera Raw Plugin 9.8 which is the latest update for the Plugin in Photoshop CC 2017.
Every time the ACR Plugin for Photoshop CC is updated a new updated version of Lightroom will also be released.
Lightroom is a complete stand alone application and does not require you to have any other Adobe application installed on your computer for it to function.
Have a look at the site below and you can follow the history of Lightroom and ACR development.
Lightroom Journal | Tips and advice straight from the Lightroom team.